Combining carbazole electron donors with a high triplet energy and a pyridine electron acceptor with a high electron affinity, 2,6-bis(3-(carbazol-9-yl)phenyl)pyridine (26DCzPPy) is one of the most popular bipolar host materials used in organic light-emitting diodes.

Bipolar host materials are molecules composed of an electron-donating moiety capable of mediating hole injection and transportation, and an electron-withdrawing moiety capable of mediating electron injection and transportation.

General Information

CAS number	1013405-24-7
Chemical formula	C41H27N3
Molecular weight	561.67 g/mol
Absorption	λmax 239, 292 nm (in CH2Cl2)
Fluorescence	λem 410 nm (in CH2Cl2)
HOMO/LUMO	HOMO = 6.05 eV, LUMO = 2.56 eV [1]
Synonyms	2,6-bis[3-(9H-Carbazol-9-yl)phenyl]pyridine DCzPPy
Classification / Family	Carbazole derivatives, Bipolar charge transport layer materials, Phosphorescent host materials, OLEDs, Organic electronics

Product Details

Purity	>98.0%
Melting point	TGA > 370 °C (0.5% weight loss)
Appearance	White powder/crystals

Chemical Structure

Device Structure(s)

Device structure	ITO/TAPC (40 nm)/TCTA (2 nm)/26DCzPPy:TCTA:FIrpic (0.4:0.4:0.2) (5 nm)/26DCzPPy:PPT:FIrpic (0.4:0.4:0.2) (5 nm)/3TPYMB (55 nm)/CsF (2 nm)/Al (180 nm) [1]
Colour	Blue
Power Efficiency @ 1000 cd/m2	24 lm W−1
Current Efficiency @ 1000 cd/m2	42 cd/A
Power Efficiency @ 1000 cd/m2	30 lm/W

Device structure	ITO/TAPC (40 nm)/TCTA (2 nm)/26DCzPPy:TCTA :FIrpic/26DCzPPy:TCTA:FIrpic:Os/26DCzPPy:PPT:FIrpic:Os/26DCzPPy: PPT:FIrpic/3TPYMB (55 nm)/CsF (2 nm)/Al (180 nm) [1]
Colour	White
Current Efficiency @ 1000 cd/m2	35.7 cd/A

Device structure	ITO/PEDOT: PSS (60 nm)/26DCzPPy:FIrpic (10 wt.%, 60 nm)/TmPyPB (30 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour	Blue
Max. EQE	12.1%
Max Current Efficiency	21.8 cd/A
Max Power Efficiency	12.7 lm/W

Device structure	ITO/PEDOT: PSS (60 nm)/TCTA:26DCzPPy:FIrpic (10 wt.%, 60 nm)/TmPyPB (30 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour	Blue
Max. EQE	14.6%
Max Current Efficiency	25.1 cd/A
Max Power Efficiency	15.7 lm/W

Device structure	ITO/TAPC:MoOx (10 nm, 15 wt.%)/TAPC(35 nm)/TcTa:Ir(BT)2(acac) (5 nm, 4 wt.%)/26DCzPPy:FIrpic (5 nm, 15 wt.%)/26DCzPPy:Ir(BT)2(acac) (5 nm, 4 wt.%)/BPhen (40 nm)/Cs2CO3(1 nm)/Al (100 nm) [3]
Colour	White
Max. EQE	13.2%
Max. Current Efficiency	35.0 cd/A
Max. Power Efficiency	30.6 lm W−1

Device structure	Si/SiO2/Al (80 nm)/MoOx: TAPC (43 nm, 15 wt.%)/TAPC (10 nm)/Ir(piq)3:TcTa (3 nm, 6%)/TcTa (2 nm)/FIrpic:26DCzPPy (5 nm, 12 wt.%)/BPhen (2 nm)/PO-01*:26DCzPPy (5 nm, 6 wt.%)/BPhen (40 nm)/Cs2CO3 (1 nm)/Al (2 nm)/Cu (18 nm)/TcTa (60 nm) [4]
Colour	White
EQE @ 1000 cd/m2	10%
Current Efficiency @ 1000 cd/m2	25.6 cd/A
Power Efficiency @ 1000 cd/m2	20.1 lm W−1

Device structure	PEN (120 mm)/ITO (170 nm)/MeO-TPD:F4-TCNQ (100 nm, 4%)/NPB (15 nm)/TCTA (5 nm)/TCTA:Ir(dmppy)2(dpp) (1 nm, 20%)/TCTA:FIrpic (4 nm, 7%)/26DCzPPy:FIrpic (4 nm, 20%)/26DCzPPy:Ir(dmppy)2(dpp) (1 nm, 20%)/TmPyPB (50 nm)/LiF (1 nm)/Al (200 nm) [5]
Colour	White
Max. Current Efficiency	96.8 cd/A
Max. Power Efficiency	101.3 lm W−1

Device structure	ITO (90 nm)/HATCN (5 nm)/TAPC (65 nm)/10 wt% fac -Ir(mpim)3 –doped TCTA (5 nm)/10 wt% fac -Ir(mpim)3 -doped 26DCzPPy (5 nm)/B3PyPB* (65 nm)/Liq (2 nm)/Al (80 nm) [6]
Colour	Blue
EQE @ 100 cd/m2	29.6%
Current Efficiency @ 100 cd/m2	73.2 cd/A
Power Efficiency @ 100 cd/m2	75.6 lm/W

Device structure	ITO/PEDOT:PSS (50 nm)/TCTA (30 nm)/26DCzPPy:Ir(mppy)3 94:6 (40 nm)/TPBI (40 nm)/LiF (0.8 nm)/Al (100 nm)  [7]
Colour	Green
Current Efficiency @ 1000 cd/m2	41.9 cd/A
Power Efficiency @ 1000 cd/m2	23.4 lm W−1

Device structure	ITO/TAPC (40 nm)/TcTa (10 nm)/5a* (4%):TcTa (5 nm)/5a* (4%):26DCzPPy (10 nm)/TmPyPB (40 nm)/LiF(1 nm)/Al(100 nm) [8]
Colour	Red
Max. Luminance	11,023 cd/m2
Max. Current Efficiency	17.36 cd/A
Max. Power Efficiency	14.73 lm W−1

*For chemical structure information please refer to the cited references.

MSDS Documentation

26DCzPPy MSDS sheet

Literature and Reviews

1. Blue and white phosphorescent organic light emittingdiode performance improvementbyconfining electrons and holes inside double emitting layers, Y-S.Tsai et al., J. Luminescence 153, 312–316 (2014); http://dx.doi.org/10.1016/j.jlumin.2014.03.040.
2. Soluble processed low-voltage and high efficiency blue phosphorescent organic light-emitting devices using small molecule host systems, Y. Doh et al., Org. Electronics, 13, 586–592 (2012); doi:10.1016/j.orgel.2012.01.003.
3. Color stable and low driving voltage white organic light-emitting diodes with low efficiency roll-off achieved by selective hole transport buffer layers, Z. Zhang et al., Org. Electronics 13, 2296–2300 (2012); http://dx.doi.org/10.1016/j.orgel.2012.07.001.
4. High performance top-emitting and transparent white organic light-emitting diodes based on Al/Cu/TcTa transparent electrodes for active matrix displays and lighting applications, Z. Zhang et al., Org. Electronics,14, 1452–1457 (2013); http://dx.doi.org/10.1016/j.orgel.2013.03.007.
5. Extremely stable-color flexible white organic lightemitting diodes with efficiency exceeding 100 lmW^-1, B. Liu et al., J. Mater. Chem. C, 2, 9836 (2014); DOI: 10.1039/c4tc01582g.
6. Low-Driving-Voltage Blue Phosphorescent Organic Light-Emitting Devices with External Quantum Efficiency of 30%, K. Udagawa et al., Adv. Mater., 26, 5062–5066 (2014); DOI: 10.1002/adma.201401621.
7. Interface and thickness tuning for blade coated small-molecule organic light-emitting diodes with high power efficiency, Y-F. Chang et al., Appl. Phys. Lett.,114, 123101 (2013); doi: 10.1063/1.4821881.
8. Efficient red organic electroluminescent devices by doping platinum(II) Schiff base emitter into two host materials with stepwise energy levels, L. Zhou et al., Opt. Lett., 38 (14), 2373-2375 (2013);http://dx.doi.org/10.1364/OL.38.002373.

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To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.

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